Eastern Samar has 597 barangays across 23 municipalities. 499 barangays (84%) are connectivity dead zones.
| Municipality | Barangays | Dead zones |
|---|---|---|
| Arteche | 20 | 19 (95%) |
| Balangiga | 13 | 10 (77%) |
| Balangkayan | 15 | 9 (60%) |
| Can-avid | 28 | 27 (96%) |
| City of Borongan (Capital) | 61 | 40 (66%) |
| Dolores | 46 | 37 (80%) |
| General Macarthur | 30 | 27 (90%) |
| Giporlos | 18 | 17 (94%) |
| Guiuan | 60 | 48 (80%) |
| Hernani | 13 | 6 (46%) |
| Jipapad | 13 | 13 (100%) |
| Lawaan | 16 | 16 (100%) |
| Llorente | 33 | 28 (85%) |
| Maslog | 12 | 12 (100%) |
| Maydolong | 20 | 18 (90%) |
| Mercedes | 16 | 10 (62%) |
| Oras | 42 | 40 (95%) |
| Quinapondan | 25 | 20 (80%) |
| Salcedo | 41 | 35 (85%) |
| San Julian | 16 | 14 (88%) |
| San Policarpo | 17 | 17 (100%) |
| Sulat | 18 | 18 (100%) |
| Taft | 24 | 18 (75%) |